Overheating AQ125a leaking cooling sustem

[JAL51974]

It took two of us to free the cover off the body of the H/E and nothing broke! Previous owner must have taken this thing apart and used some kind of sealant on the gasket that did not budge until I applied some heat. Now I’ll get the insert cleaned out, clean up the mating surfaces and new gaskets. Hopefully this will resolve the issues. Thanks.

 

[JAL51974]

Update
I’ve spent too much of the summer diagnosing and attempting to solve the leak and overheat problems. I’ve serviced the heat exchanger and replaced all the seal and gaskets. But it leaks antifreeze where the plastic strainer housing meets the metal top of the heat e exchanger. This is with the engine OFF under no pressure. I’ve had it apart so many times and it all looks good but still leaks- a tiny drip. Can you put RTV red sealant under the plastic to seal it? I’m suspecting the plastic has warped when it overheated.

Another antifreeze leak happens at the upper connection between the heat exchanger and the tank for coolant. Very tiny spot. Can this be sealed with someRTV sealant?


Thanks.

 

[kenny nunez]

Give the RTV a try, just clean everything and let it set a few days. Be sure to drain the coolant below the leaks. Some RTV sealants may not hold up against coolant so be sure which one you use.

 

[JAL51974]

Thx will let you know.